Stamp



FIG. 1 is a perspective view of a stamp showing our new design;

FIG. 2 is a front view thereof,

FIG. 3 is a rear view thereof,

FIG. 4 is a left side view thereof,

FIG. 5 is a right side view thereof,

FIG. 6 is a plan view thereof,

FIG. 7 is a bottom view thereof,

FIG. 8 is an enlarged cross-sectional view thereof taken along line A—A in FIG. 2; and,

FIG. 9 is an enlarged cross-sectional view thereof taken along line B—B in FIG. 5. 

The ornamental design for a stamp, as shown and described. 